Bolting-mill.



No. 757,227. PATENTED APR. 12, 1904.

A. RENAULT da G. GUSSON.

BOLTING MILL. APPLIGATION FILED FEB.. 1, 1900. No Monnr.. a sums-snm- 2.

lll/lll/ Gea/ye.; mu-01a v 'y 19)/ No. 757,227.v K PATENTED APR. 12, 1904. -A. RENAULT & G. CUSSON;

BOLTING MILL. APPLIUATION FILED PEB. 1. 41900. No MODEL. a sums-SHEET a.

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N0, 757,227. Patented April 12, 1904.

CHATEAUROUX, AND GEORGES CUSSON, OE

ANTHIME RENAULT, OF

. ST. VGrENOU, FRANCE.

BOLTlNG-NIILL.

LSECFICATION forming part of Letters Patent No. 757,227, dated April 12, 1904.

Application filed February 1, 1900. Serial No. 3,624. (No model.)

der 9, which is underneath. The iour adheres to this surfacev and is detached therefrom by a scraper 1() to reach the collecting-compartment 11. The heavier products, termed semolina, are thrown upon an inclined plate 12 and are collected separately. The remainder of the product to be sifted falls upon the following smooth-surfaced cylinder 9, similar to the first and working in the 'same way, and so on upon other similar cylinders until the last one is reached, where the separation takes place of the grains from what remains of flour. The fairly-heavy grains are thrown upon the plate 18, and the fine grains fall into the collecting compartment 14. Plates 15 determine the extent of the fall of the product to be sifted upon the cylinders. The separation of the finest parts can in reality be rendered more or by causing the iour to be purified to fall more or less out of the vertical plane which passes through lthe axes of the cylinders. This adjustment is obtainedby the position given to the plates 15. These can for this purpose be mounted in such a manner as to be moved when so desired. For instance, the plates may carry slotted arms engaged by ,stationary pins or set-screws, as shown for the uppermost plate 15 in Fig. 2. By causing the flour to fall to a point nearer the circumference of the cylinder the latter will carry less flour, but the flour will be purer. 1f purification is to be less careful, we then direct the product to be treated toward a point nearer the vertical plane. The yield is then greater, but the purification is less good.

Our apparatus enables us to extract what is known as bakers flour, (a flour especially used by bakers and pastry-cooks,) to bolt ordinary flour, and to divide or separate groats or grains. It also allows us to bolt the material coming from the grain-converters by substituting for the metallic-gauze cylinder B a cylinder of less diameter, having a smooth surface and being similar to the cylinders 9.

The arrangement of Fig. 2 forms, in fact, a set or group of two apparatus such as we have just described and superposed. Itis intended for rebolting the flour and for replacing bol TU aZZ whom, it irl/tty concern:

Be it known that we, ANTHIME RENAULT,

of Chateauroux, and GEORGES CUSSON, of St.

` Grenou, (Indre,) France, have invented certain 5 new and useful Improvements in Bolting- Mills, of which the following is afull, clear, and exact description. Y

This invention relates to an apparatus for purifying and sifting iiour, cement, lime,

IO phosphates, and other pulverulent materials.

We shall describe an apparatus as applied to sifting or bolting the products of a flourmill; but the invention can be applied to other similar products.

I5 Figures 1, 2, 3, A, and 5 of the annexed `drawings illustrate in vertical section various forms of the apparatus as applied to flourmills.

The apparatus comprises, essentially, a certain number of smooth-surfaced cylinders arranged horizontally and placed one above another. Upon the drawings these cylinders are shown only in cross-section.

Theapparatus is based upon a particular property of powdered impalpable substances, such as flour, which being thrown upon a smooth-surfaced rotating cylinder partly adhere to this surface, which carries them, while ythe least fine portions and the impurities do not possess this property and are thrown 0E with the portion of the flour not carried along.

The arrangement in Fig. 1 is suited to the sifting or bolting of the product of a grinding apparatus, such as an ordinary roller 3 5 grinding-mill.

The product to be sifted or bolted is carried along by a worm 1 and is fed onto a brush 2, .which divides and distributes it over a grid 3, whence it falls between two plates or guides fro 4 and 5 upon a cylinder 6, furnished with metallic gauze or sheathing. The grains or `groats and flour all pass through the meshes of the metallic gauze. The rejected portion is thrown upon an inclined plate 7, to be submitted -again to grinding. Against the cylinder 6 there works a brush 8, intended to keep the meshes free or open. The flour or grains having passed intothe cylinder 6 fall upon a smooth-surfaced and rapidly-revolving cylinless complete at each cylinder' rangements as in the preceding instances. It falls upon the first three or four cylinders, which commence to take up a certain quantity of flour. The remainder is thrown in a stream from cylinder to cylinder, so that when ing usually termed safety The liour separated by the lirst set of three cylinders 9, arranged according to the manner previously described, is directed and guided by a plate 21 onto the second set, which contains four cylinders, by means of which it is again guided. The waste or rejected portion furnished by the first set of three cylinders is brought, by means th of the plates 16 17, to the last cylinder of the lower set, which cylinder receives at the same time the waste which has been, with the flour, passed over the upper cylinders of this set. The iinal waste is thrown at 14, and the Hour at 11, into compartments wherein we arrange screw conveyers, if necessary. Y

The apparatus shown on Fig. 3 is used for the final passage of the ground product and as a bran-brush or bran-cluster. The bran mixed with flour and grains or groats having been conducted or conveyed from the chute from the mill is directed onto the iirst cylinder 9. The heavy bran is thrown upon an inclined plate16, and the iiour remains, adhering to this smooth-surfaced cylinder. The remainder falls upon a brush 17. which serves to material to be bolted.

As we have before stated, the precise arrangements can be varied according to the actual application and according to the material to be bolted. The constructions just described are examples only and suitable for iiour-mills or bolting-rooms. The rotatory speed of the cylinders, their diameters, their precise construction, and the material of which they are composed will be varied according to the 'substance treated.

The length of the cylinder is proportioned to the output to be afforded by the apparatus. The degree of iineness of the bolting is decylinders.

modilications as rendered necessary without departing from the principle thereof.

We claim- 1. An apparatus for bolting or grading iiour and other pulverulent materials, comprising hard smooth-surfaced rollers,

and the larger part of the small bran is expelled onto the plate 18. Underneath is previously described. The coarse bran is thrown on a plate 19. Upon the last cylinder 9 there remains only a small quantity of flour with fine grains or groats. The iiour is thrown back into theA compartment 11 by the Scrapers 10, and the fine grains are collected in the compartment In case of the application of this arrangement as a bran-brush or bran-duster the bran erty of said coarse particles will be thrown oif, as set forth.

2. An apparatus for bolting or grading flour and other pulverulent materials, comprising hard smooth-surfaced rollers revolving at a hig speed and arranged at different levels d each in receiving relation to the next roller above, whereby the tine particles will be retained on the rollers by the adhesive property of said particles while the will be th ders to the bottom, falling into the compartment 14, while the extracted flour is collected in the compartment 11. To obtain this result, we have to change only the arrangement of plates.

The apparatus shown in Fig. 4 is suited to sifting and to use as a bran-duster. The flour adhering to the cylinders is collected at 14, while at the center 2O there will remain the bran or the grains, according to whether the apparatus is used as a bran-duster or for sifting grains or groats. In the latter case the grains being mixed at 2O must pass over two or tlree cylinders in order to be properly separate The arrangement of Fig. 5 can be adopted for bolting in general. The characteristic of this arrangement consists in the fact that there is no longer an inclined plate to direct onto the cylinders the material to be bolted. e material is distributed by the same ar- 3. An apparatus for bolting or grading iiour and other pulverulent materials, comprising high and in receiving relation to each other, by the fine particles will be retained on the rollers by the adhesive property of said particles while the coarse particles will be thrown 01T, a concave grid above the uppermost roller, a rotary brush the periphery of which is adjacent to and concentric with the grid, and means for feeding the material to the brush, as set forth.

4. An apparatus for bolting or grading iour hard smooth-surfaced rollers revolving at a` IOC IIO

ISO

and other pulverulent materials, comprising a plurality of rollers rotating at a high speed and having hard smooth surfaces, said rollers being arranged one above the other and adapted to retain the iine particles thereon by the adhesive property of said particles, a hollow cylinder having a perforated or reticulated sheathing arranged above the uppermost roller, and means for feeding the material to the peripheryT of said cylinder, as set forth.

5. An apparatus for bolting or grading our and other pulverulent materials,.comprising a plurality of rollers rotating at a high speed and having hard'smooth surfaces, said rollers being arranged one above the other, a hollow cylinder having a perforated or reticulated sheathing and arranged above the uppermost roller, a spout for delivering the material to the periphery of the cylinder, agrid at the upper part of the spout, and a rotaryv brush adjacent to the grid, as set forth.

6. An apparatus for bolting or grading flour and other pulverulent materials, comprising a plurality of rollers having hard smooth surfaces and rotating at a high speed, said rollers being arranged one above the other and adapted to retain the iine particles thereon by the adhesive property of said particles, and means for causing the material to be delivered tothe said rollers nearer to or farther from their longitudinal centers, as and for the purpose set forth.

7 An apparatus for bolting or grading flour and other pulverulentmaterials, comprising aseries of rollers having hard smooth surfaces, said rollers being arranged one above the other and adapted to retain the fine' particles thereon by the adhesive property of said particles, a scraper for each roller for removing the fine ing the material to the uppermost roller, an outwardly and downwardly inclined plate arranged adjacent to the top and bottom rollers, and adjustable inclined plates for causing the material to be delivered to the rollers nearer 45 to or farther from their longitudinal centers,

as set forth.

8. In an apparatus for bolting or grading flour and the like, aplurality of hard smoothsurfaced rollers revolving at ahigh speed and 50 arranged one above the other, means for delivering the material to the uppermost roller., and an adjustable plate for e'ach roller for causing the material to be delivered nearer to or farther from the longitudinal center thereof, 55 as set forth.

9. In an apparatus for bolting or grading flour and the like, a plurality of hard smoothsurfaced rollers revolving at ahigh speed and each roller, means for delivering the material to the uppermost roller, and adjustable plates for causing the material to be delivered to the rollers nearer to or farther from their longitudinal centers, as set forth. 65 In testimony whereof we have.,` signed our names to this specification in the presence of the two subscribing witnesses.

ANTI-IIME RENAULT. [L. sj GEORGES CUSSON. [L. s]

Witnesses: y A

AIM BRODEAUX. [L. s] GABRIEL SAMIE. [L. s]

particles therefrom, a feed device for deliver- 40 arranged one above the other, a scraper for 60 

